Measurement of two-phase velocities in bubble flows using laser Doppler velocimetry
作者机构:Department of Engineering MechanicsZhejiang UniversityHangzhou310027China Iron and Steel Research Institutes of Ansteel Group CorporationAnshan114009China State Key Laboratory of Metal Material for Marine Equipment and ApplicationAnshan114009China
出 版 物:《Journal of Hydrodynamics》 (水动力学研究与进展B辑(英文版))
年 卷 期:2022年第34卷第6期
页 面:1134-1144页
核心收录:
学科分类:080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学(可授工学、理学学位)]
基 金:Project supported by the State Key Program of National Natural Science of China(Grant No.91852204) supported by the Program of State Key Laboratory of Marine Equipment(Grant No.SKLMEA-K201910)
主 题:laser Doppler velocimetry(LDV) bubbly flow phase discrimination bubble tracking velocimetry(BTV)
摘 要:The measurement of two-phase velocities in bubble flows using laser Doppler velocimetry(LDV)is *** key to the problem is to differentiate the LDV signals from bubbles and tracers,based on which the two-phase velocities can be *** this study,two experiments are carried ***,the bubble-chain experiment is performed to investigate the optical response of bubble surface and the corresponding LDV *** optical response shows that the light received by the LDV detector is dominated by the reflection component,which is similar to specular reflection to some *** are three typical patterns of signals of large bubbles passing through the measurement volume,all of which are with high amplitude and ***,the upward-flow experiment is conducted to study the statistical characteristics of large bubbles as well as micro tracers and micro *** results show that the amplitude of signal of millimeter bubbles is about an order of magnitude larger than that of tracers or micro *** on this significant difference of the amplitude,we propose a phase discrimination method to distinguish two-phase *** capability of the proposed method is tested in a complex bubble flow,and its reliability is verified by bubble tracking velocimetry(BTV)technology.